Hubble Makes First Measurements of Earth-Sized Exoplanet Atmospheres

  • Released Wednesday, July 20, 2016
  • Updated Tuesday, May 9, 2017 at 5:23PM
  • ID: 12319

On May 4th, 2016, the Hubble Space Telescope made the first spectroscopic measurements of two of the three known Earth-sized exoplanets in the TRAPPIST-1 system just 40 light-years away. Now the results are in: a thick, puffy, hydrogen-helium atmosphere is likely ruled out from the possible range of atmospheres for these two planets.

Additional visuals from the European Southern Observatory can be downloaded here:

Animation - Artist concept of the double-transit Hubble observed on May 4, 2016, when planets TRAPPIST-1b and TRAPPIST-1c passed across the disk of their host star just minutes apart.


Please give credit for this item to:
NASA's Goddard Space Flight Center


This visualization is based on the following papers:


This visualization is related to the following missions:

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